This report documents the design, development and operation of a scalable flex plate resistance dynamometer for use in ship model resistance testing at OCRE/NRC St John’s replacing and improving on the traditional linear bearing resistance dynamometer. The report also contains the user manual detailing the setup of available operational modes for the dynamometer. There is also a proposal for future project development regarding an in-situ in line loading apparatus and adoption of the other facility gimbals to the flex dynamometer configuration.